Paint for truck cap??

Hi all..i was wondering what kind of paint, and how to paint a truck cap? I will say that I was given this cap and am not interested in spending the money to get it done right. It also is not a perfect fit. I just don't want it sticking out like a sore thumb...my truck is red and the cap is blue. The cap is in really good shape. I was thinking of just going black because I think I'd have a hard time matching the red. Any advice would be greatly appreciated!

i say spray is going to be the best. as far as looks. and prob easier. bush will have all kinds of lines and stuff from the bristles (may have spelled that wrong. i stayed up all night) and i hear you can get paint that is same exact color as the truck. but like i said idk wear or how to get it.